Apparatus for cutting metal shavings.



No.l 655,868. y y Patented Aug. |4`, |900 A. HULTGEN.

APPARATUS FOR CUTTING METAL SHAVINGS.

(Application led May 24, 1900.)

(No Model.)

PATENT OFFICE.

AUGUST HOLTGEN, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE- HALF TO WILLIAM E. HAMPTON, OF SAME PLACE.

APPARATUS Fos CUTTING METAL sHAviNes.

SPECIFICATION forming part of Letters Patent No. stacca, dated 'August 14, ieoo. Application filed May 24, 1900. Serial No. 17,793- (NO model.)

T0 a/ZZ whom, t 77mg/ concern:

Be it known that I, AUeUs'r HoL'rGEN, a citizen of the United States, residing in the city and county of San Francisco, State of California, have invented an Improvement in Apparatus for Cutting Metal Shavings; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to an, apparatus which is designed to cut sheets of metal into thin shavings.

It consists of a journaled arbor with means for applying power to revolve it, means for securing one edge of the sheet of metal to the arbor, so that the sheet may be coiled thereon -to any desired thickness, a cutting-tool, and

means for advancing it parallel with the arbor, so as to cut shavings from the end of the roll of metal thereon.

It also comprises details of construction which will be more fully explained by reference to the accompanying drawings, in which-'- Figure l is a perspective view of the apparatus, showing a coil of metal in position for shaving. Fig. 2 is an end view of the toolholder, showing the tool in position for retrograde movement. Fig. 3 is a transverse section of the shaft A with coil of metal in position.

The object of this invention is especially to cut zinc or like metal into very thin shavings. rying on what is known as the cyanid7 process of gold extraction, and these shavings have hitherto been made by cutting a number of disks of sheet metal, perfor-ating them centrally, clamping them between iianges, so that the edges project, and then turning the shavings off the projecting edges by hand. This is a wasteful and expensive operation, because the disks must be cut out of the sheets, the remainder of which is useless, and the shavings, being cut by handtools, are very unequal in thickness.`

My invention is designed to economize the zinc by cutting the whole of it and to make a uniform product.

A is a shaft or arbor journaled in boxes 2 and having fast and loose driving-pulleys 3, through which motion is communicated to rotate it. This arbor has a channel or key- Such shavings are largely used in car" which are usually made three feet wide and seven feet long. These sheets are cut through the center, so as to leave each sheet, eighteen inches wide'7 which enables me to use a suffi` eiently-short arbor, so that it will not be liable to spring between its bearings, althoughby making it larger and heavier the full Width of the sheet could be utilized, if preferred. The sheet of zinc is then coiled upon the arbor, and, it' desired, the second sheet can be abutted against the first and a larger coil made. In either case the edge of the sheet is soldered, so as to hold it closely in place, thus forming a tight coil about the arbor. Parallel with the arbor is a screw f), journaled in bearings at each end and having upon one end a ratchet or toothed Wheel 7. Upon the projecting end of the arbor is an eccentric-pin upon which is pivoted a pawl 8, this pawl engaging with the teeth of the ratchet 7.

9 is a tool-l1older the lower part of which travels beneath the screw 6 and is not threaded. The upper part is hinged to the lower and has screw-threads cut in it to iit the threads of the screw 6. This upper part is adapted to hold the square-nosed tool l0, and when the tool-carrier is closed upon the screwthread the tool is advanced until the end is just clear of the arbor and is then held in position by a set-screw 1l o'r other equivalent fastening.

The speed of rotation of the arbor may be from two hundred to two hundred and fifty revolutions per minute, and each rotation of the arbor by the eccentric movement of the pawl 8 advances the ratchet-wheel 7 a single tooth, thus turning the screw G whatever proportion of a revolution the distance between the teeth represent. The cutting-tool l0 will thus be correspondingly advanced at each revolution and will thus cut shavings from the I op end of the roll of metal on the arbor,which may be as thin as one five-hundredths of an inch, and by reason of the regularity of the feed the shavings will be uniform in thickness, which is a point of value in the subsequent processes above alluded to.

By this apparatus the whole of the zinc can be cut into shavings, and when the end of the roll has been reached it is onlyv necessary to lift the upper part of the tool-holder clear of the screw-threads and slide the holder and tool back to the beginning of the screw in readiness for another cut.

In order to remove the key 5 from the keyway 4t, a hole maybe made through the arbor, as shown at l2, so that a tool can be introduced to drive the key out.

If desired, any suitable well-known disengaging device may be employed to lift the pawl and stop the feed when the end of the roll has been reached; but this would only be necessary in case no operator were near to attend to it.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l.v An apparatus for producing metal shavings, consisting of an arbor upon which a sheet of metal is rolled and secured, a cuttingtocl adapted to contact with the end of the roll thusformed,and means includingafeedscrew having a ratchet and a connection from the arbor engaging the ratchet for feeding the tool forward at each revolution of the arbor.

2. An apparatus for cuttin g metal shavin gs of uniform thickness consisting of a j ournaled arbor having a keyway along its surface, a key by which the edge of the sheet of metal is locked to the arbor, said sheet being coiled upon itself and secured, a cutting-tool adapted to contact with the end of the coiled sheet, and a feed mechanism including a feed-screw having a ratchet and a connection from the arbor engaging the ratchet, by which the tool is advanced at each revolution of the arbor.

3. An apparatus for cutting shavings from sheets of metal consisting of a journaled arbor, a means whereby it is rotated, a keyway formed in one side of the arbor, a key fitting therein so as to lock one edge of the sheet of Ametal to the arbor, said sheet being coiled upon itself and having the outer end secured so as to form a solid roll, a cutting-tool, a holder in which said tool is adj ustably fixed, with its end close to the arbor, a revoluble screw engaging with threads in the toolholder,an'dmeans including a feed-screw having a'ratchet and a pawl connection from the arbor engaging said ratchet by which said screw is revolved to advance the holder and tool into contact with the end of the inet-al roll at each revolution of the arbor.

4. An apparatus for producing metal shavings of uniform size consisting of a journaled revoluble arbor having a keyway and key by which one edge of the sheet of metal is secured to the arbor, said sheet being coiled about the arbor and having its opposite edge fastened so as to form a solid roll, a screw journaled parallel with the arbor, a toolholder having threads engaging the screw and means for securing the tool so as to contact with the end of the roll, a ratchetewheel fixed upon the screw-shaft and a pawl eccentrically mounted upon the arbor and engaging the teeth of the ratchet to advance it with each revolution of the arbor.

5. An apparatus for cutting sheet metal into shavings of uniform thickness consisting of a journaled revoluble arbor, means for securing one end of the sheet to the arbor, said sheet being coiled upon itself and the outer edge fastened, a screw journaled and revoluble parallel with the arbor having a ratchetwheel upon its outer end, a pawl mounted upon a pin fixed eccentrically in the end of the arbor whereby the pawl is moved to advance the ratchet-Wheel at each revolution of the arbor, a tool-holder consisting of a lower slidably-guided plain portion, and an upper portion hinged thereto having screw-threads engaging those of the screw when closed, said upper section being adapted to receive the tool, with means for adjusting and locking the latter thereto.

In witness whereof I have hereunto set my hand.

AUGUST IIOLTGEN.

Witnesses:

HENRY C. DROGER, JAMES L. KING. 

